> For the complete documentation index, see [llms.txt](https://docs.belugas.io/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.belugas.io/atokens/redeem.md).

# Redeem

The redeem function converts a specified quantity of bTokens into the underlying asset, and returns them to the user. The amount of underlying tokens received is equal to the quantity of bTokens redeemed, multiplied by the current [Exchange Rate](/atokens/exchange-rate.md). The amount redeemed must be less than the user's [Account Liquidity](/comptroller/get-account-liquidity.md) and the market's available liquidity.

**BErc20 / CEther**

```
function redeem(uint redeemTokens) returns (uint)
```

* `msg.sender`: The account to which redeemed funds shall be transferred.
* `redeemTokens`: The number of bTokens to be redeemed.
* `RETURN`: 0 on success, otherwise an [Error code](/atokens/error-codes.md)

**Solidity**

```
CEther bToken = CEther(0x3FDB...);
require(bToken.redeem(7) == 0, "something went wrong");
```

**Web3 1.0**

```javascript
const bToken = BErc20.at(0x3FDA...);
bToken.methods.redeem(1).send({from: ...});
```